Commonwealth legislation

AD/SD3-60/40 Amdt 1 - Flight Controls Rudder Gust Lock System

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Commonwealth

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legislative instrument

Plain English Summary

3/10 complexity

Mandates modification of the rudder gust‑lock electrical circuit on Short SD3‑60 aeroplanes named in Shorts Service Bulletin SD360‑27‑23 Rev 1 (15 Apr 1994). Operators must complete the wiring change, including fitting a time‑delay relay, before 28 July 1994.

The relay delays possible rudder locking when the weight‑on‑wheels switch is closed if the actuator runs away in flight. The amendment makes only minor wiring and instruction changes; aircraft operators (owners) pay for the work and maintenance personnel implement it.

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Direct links to the current provisions in AD/SD3-60/40 Amdt 1 - Flight Controls Rudder Gust Lock System.

AD/SD3-60/40 Amdt 1 - Flight Controls Rudder Gust Lock System

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Short SD3-60 Series Aeroplanes

AD/SD3-60/40

Amdt 1

Flight Controls Rudder Gust Lock System 8/94

Applicability: All SD3-60 aircraft listed in Short Brothers PLC Service Bulletin SD360-27-23 Revision No 1 dated 15 April 1994.

Requirement: Modify the rudder gust lock electrical circuit in accordance with Shorts SD3-60 Service Bulletin SD360-27-23 Revision No 1 dated 15 April 1994.

Note: This Service Bulletin has been classified as Mandatory by the CAA(UK).

Compliance: Prior to 28 July 1994.

Background: The original issue of this Directive required the introduction of a time delay relay in the rudder gust lock electrical control circuit. This relay delays possible locking of the rudder, with the weight on wheels switch closed, if the actuator has runaway in flight.

This amendment reflects a revision to the Requirement Document, which contains minor changes to the wiring and accomplishment instructions. The compliance date is unchanged.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

1 AD/SD3-60/40 Amdt 1 - Flight Controls Rudder Gust Lock System